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巷道障碍物对风速监测位置的影响研究

张京兆 熊帅 范京道 闫振国 黄玉鑫 张亚爽

张京兆,熊帅,范京道,等. 巷道障碍物对风速监测位置的影响研究[J]. 工矿自动化,2023,49(9):64-72.  doi: 10.13272/j.issn.1671-251x.2023020040
引用本文: 张京兆,熊帅,范京道,等. 巷道障碍物对风速监测位置的影响研究[J]. 工矿自动化,2023,49(9):64-72.  doi: 10.13272/j.issn.1671-251x.2023020040
ZHANG Jingzhao, XIONG Shuai, FAN Jingdao, et al. Research on the influence of roadway obstacles on the position of wind speed monitoring[J]. Journal of Mine Automation,2023,49(9):64-72.  doi: 10.13272/j.issn.1671-251x.2023020040
Citation: ZHANG Jingzhao, XIONG Shuai, FAN Jingdao, et al. Research on the influence of roadway obstacles on the position of wind speed monitoring[J]. Journal of Mine Automation,2023,49(9):64-72.  doi: 10.13272/j.issn.1671-251x.2023020040

巷道障碍物对风速监测位置的影响研究

doi: 10.13272/j.issn.1671-251x.2023020040
基金项目: 国家自然科学基金资助项目(51974232)。
详细信息
    作者简介:

    张京兆(1976—),男,河南渑池人,副教授,硕士研究生导师,主要从事矿井通风与粉尘防治方面的教学与研究工作,E-mail:1009282107@qq.com

    通讯作者:

    熊帅(1999—),男,甘肃张掖人,硕士研究生,主要从事矿井通风方面的研究,E-mail: 1627900018@qq.com

  • 中图分类号: TD723

Research on the influence of roadway obstacles on the position of wind speed monitoring

  • 摘要: 现有高精度风速传感器在井下的安装位置统一采用正常风流流动状况下的方案,未综合考虑巷道放置障碍物等导致风流异常的情况,达不到智能通风的风速精度要求,难以实现矿井的安全生产。针对上述问题,以小纪汗煤矿11218回风巷为研究对象,对井下巷道中障碍物不同位置与不同尺寸对风速的影响展开研究,结合现场实测巷道基础参数与Fluent软件构建贴合该矿特征的巷道模型,研究了距上游端口10 m处底板放置的障碍物与两帮的距离(简称间距L)及其形状大小、放置方式等因素对巷道风速监测位置的影响。① 定量分析结果发现:各模型于断面直角处存在微小部分的合理风速区域,其面积在L=0.5 m时最大,L=1 m时次之,L=0时最小;随着间距L的增加,风速传感器最佳布设位置随x坐标(巷道走向)的增加呈均匀分布−截面直角处微量分布−空心圆角矩形分布的规律,且合理风流向两帮扩散更快;L=0时,顶板位置中垂线的合理风流分布在2.59~2.78 m处;L=0.5 m时,顶板位置中垂线的合理风流分布在2.59~2.80 m处;L=1 m时,顶板位置中垂线的合理风流分布在2.61~2.78 m处。② 定性分析结果表明:放置障碍物巷道的平均风速均呈增大−减小−增大−平衡的状态;障碍物竖放或宽度增加对风流影响较大;障碍物体积相同,风速峰值大致相同;风流发展稳定时,L=0.5 m时风速可靠性最高,L=1 m时次之,L=0时可靠性相对最低。③ 通过风速普适性分析得出:在同模型下,不同风速变化率均处于上升−下降−再上升−平衡的4个阶段;在模型2、间距L=0.5 m条件下,对回风巷风流运移规律影响较小的结论具有风速普适性。

     

  • 图  1  模型关键部位

    Figure  1.  Key parts of the model

    图  2  L=0.5 m时巷道模型的俯视图

    Figure  2.  Top view plan of the roadway model at L=0.5 m

    图  3  L=0.5 m时模型2局部网格划分

    Figure  3.  Model 2 local grid division at L = 0.5 m

    图  4  进风口风流场云图及分析节点

    Figure  4.  Inlet airflow field cloud diagram and analysis node

    图  5  L=0时所有模型的5种截面位置所对应的风流场云图

    Figure  5.  Cloud plot of wind fields corresponding to the five cross-sectional positions of all models at L =0 m

    图  6  L=0.5 m时所有模型的5种截面位置所对应的风流场云图

    Figure  6.  Cloud plot of wind fields corresponding to the five cross-sectional positions of all models at L =0.5 m

    图  7  L=1 m时所有模型的5种截面位置所对应的风流场云图

    Figure  7.  Cloud plot of wind fields corresponding to the five cross-sectional positions of all models at L=1 m

    图  8  不同模型平均风速对比

    Figure  8.  Comparison of the average wind speed of different models

    图  9  同间距风速对比

    Figure  9.  Wind speed comparison at the same distance

    图  10  同模型风速变化率对比

    Figure  10.  Comparison of wind speed change rate with the same model

    表  1  11218回风巷截面参数信息

    Table  1.   11218 return air roadway parameter information

    高度/m 宽度/m 周长/m 断面积/m2 进风口风速/(m·s−1
    3.16 5.54 17.4 17.51 2
    下载: 导出CSV

    表  2  障碍物信息

    Table  2.   Obstacle information

    l/m b/m h/m
    障碍物1 1 1 1
    障碍物2 2 1 1
    障碍物3 1 1 0.5
    障碍物4 2 1 0.5
    障碍物5 1 0.5 1
    障碍物6 2 0.5 1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-02-13
  • 修回日期:  2023-09-15
  • 网络出版日期:  2023-09-27

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